# SSL 발급을 위한 디렉토리 생성
sudo mkdir -p /var/www/letsencrypt/.well-known/acme-challenge

sudo apt update # apt 업데이트

# nginx 설치
sudo apt install nginx-core

# ubuntu 계정에 권한 및 파일 수정 권한을 부여
sudo touch /etc/nginx/snippets/letsencrypt.conf
sudo chown root:ubuntu /etc/nginx/snippets/letsencrypt.conf
sudo chmod 775 /etc/nginx/snippets/letsencrypt.conf

# /etc/nginx/snippets/letsencrypt.conf 열기
sudo vi /etc/nginx/snippets/letsencrypt.conf

# /etc/nginx/snippets/letsencrypt.conf 파일에 아래 텍스트 입력 후 저장
location ^~ /.well-known/acme-challenge/ {
	default_type "text/plain";
	root /var/www/letsencrypt;
}

# /etc/nginx/sites-available/default 파일 수정
sudo vi /etc/nginx/sites-available/default

##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# https://www.nginx.com/resources/wiki/start/
# https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
# https://wiki.debian.org/Nginx/DirectoryStructure
#
# In most cases, administrators will remove this file from sites-enabled/ and
# leave it as reference inside of sites-available where it will continue to be
# updated by the nginx packaging team.
#
# This file will automatically load configuration files provided by other
# applications, such as Drupal or Wordpress. These applications will be made
# available underneath a path with that package name, such as /drupal8.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

# Default server configuration
#
server {
        listen 80 default_server;
        listen [::]:80 default_server;

        # SSL configuration
        #
        # listen 443 ssl default_server;
        # listen [::]:443 ssl default_server;
        #
        # Note: You should disable gzip for SSL traffic.
        # See: https://bugs.debian.org/773332
        #
        # Read up on ssl_ciphers to ensure a secure configuration.
        # See: https://bugs.debian.org/765782
        #
        # Self signed certs generated by the ssl-cert package
        # Don't use them in a production server!
        #
        # include snippets/snakeoil.conf;

        root /var/www/html;

        # Add index.php to the list if you are using PHP
        index index.html index.htm index.nginx-debian.html;

        server_name _; # _를 example.com 처럼 바꿈

		include /etc/nginx/snippets/letsencrypt.conf;

        location / {
                # First attempt to serve request as file, then
                # as directory, then fall back to displaying a 404.
                try_files $uri $uri/ =404;
        }

        # pass PHP scripts to FastCGI server
        #
        #location ~ \.php$ {
        #       include snippets/fastcgi-php.conf;
        #
        #       # With php-fpm (or other unix sockets):
        #       fastcgi_pass unix:/run/php/php7.4-fpm.sock;
        #       # With php-cgi (or other tcp sockets):
        #       fastcgi_pass 127.0.0.1:9000;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #       deny all;
        #}
}


# Virtual Host configuration for example.com
#
# You can move that to a different file under sites-available/ and symlink that
# to sites-enabled/ to enable it.
#
#server {
#       listen 80;
#       listen [::]:80;
#
#       server_name example.com;
#
#       root /var/www/example.com;
#       index index.html;
#
#       location / {
#               try_files $uri $uri/ =404;
#       }
#}

# nginx 적용
sudo nginx -t

# nginx 다시시작
sudo service nginx restart

# snap core 설치
sudo snap install core; sudo snap refresh core

# certbot 구버전 제거
sudo apt remove certbot

# snap으로 certbot 신버전 설치
sudo snap install --classic certbot

# /snap/bin/certbot -> /usr/bin/certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot

# ssl 인증서 받기
# example@example.com을 자신의 이메일로 바꾸고, example.com을 자신의 도메인으로 바꾼다
sudo certbot certonly --webroot --agree-tos --no-eff-email --email example@example.com -w /var/www/letsencrypt -d example.com -d www.example.com

# 인증서 위치 확인
sudo ls /etc/letsencrypt/live/

# 인증서 확인
sudo ls -al /etc/letsencrypt/live/example.com // 자신의 도메인을 example.com처럼 입력한다

# 자동 업데이트 테스트
sudo certbot renew --dry-run

# pem 파일 확인
sudo ls -al /etc/letsencrypt/live/example.com

# 인증서 적용
sudo openssl dhparam -out /etc/nginx/dhparam.pem 4096

# /etc/nginx/snippets/ssl.conf를 열기
sudo vi /etc/nginx/snippets/ssl.conf

# /etc/nginx/snippets/ssl.conf에 밑에 코드 복사 후 저장
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_session_tickets off;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3;
ssl_dhparam /etc/nginx/dhparam.pem;
ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384;
ssl_ecdh_curve secp384r1;
ssl_prefer_server_ciphers on;
ssl_stapling on;
ssl_stapling_verify on;

resolver 8.8.8.8 8.8.4.4;
add_header Strict-Transport-Security "max-age=15768000; includeSubdomains; preload";
add_header X-Content-Type-Options nosniff;
add_header X-Frame-Options "SAMEORIGIN";

# /etc/nginx/snippets/ssl.conf 접근 권한 막기
sudo chmod 644 /etc/nginx/snippets/ssl.conf

# /etc/nginx/sites-available/default 열기
sudo vi /etc/nginx/sites-available/default

# /etc/nginx/sites-available/default에 밑에 내용 복사 후 저장. example.com은 자신의 도메인으로 바꾼다

# Default HTTPS server configuration
server {
	listen 443 ssl http2 default_server;
	listen [::]:443 ssl http2 default_server;
	server_name example.com;

	ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
	ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
	ssl_trusted_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
	include /etc/nginx/snippets/ssl.conf;

	root /var/www/html;
	index index.php index.html index.htm index.nginx-debian.html;

	location / {
		#try_files $uri $uri/ =404;
		#if (!-e $request_filename) {
		# rewrite ^.*$ /index.php last;
		#}
		proxy_pass http://localhost:8080;
	}

	location ~ \.php$ {
		include snippets/fastcgi-php.conf;
		fastcgi_pass unix:/run/php/php7.4-fpm.sock;
		fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
		include fastcgi_params;
		fastcgi_read_timeout 300;
	}

	location ~ /\.ht {
		deny all;
	}
}

# HTTPS www. server configuration
server {
	listen 443 ssl http2;
	listen [::]:443 ssl http2;
	server_name www.example.com;

	ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
	ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
	ssl_trusted_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
	include /etc/nginx/snippets/ssl.conf;

	location / {
		return 301 https://example.com$request_uri;
	}
}

# Default server configuration
server {
	listen 80;
	listen [::]:80 default_server;
	server_name example.com;

	include /etc/nginx/snippets/letsencrypt.conf;

	location / {
		return 301 https://example.com$request_uri;
	}
}

# HTTP - CNAME Connect www.example.com to example.com

server {
	listen 80;
	listen [::]:80;
	server_name www.example.com;

	include /etc/nginx/snippets/letsencrypt.conf;

	location / {
		return 301 https://www.example.com$request_uri;
	}
}

sudo nginx -t

sudo service nginx restart

# 갱신 방법
sudo certbot renew --dry-run

# 갱신 방법 2
sudo certbot certonly --webroot --agree-tos --no-eff-email --email 이메일주소 -w /var/www/letsencrypt -d 도메인주소 -d www.도메인주소